| Abstract: | A new binary operation on the family of equivalence relations was introduced andstudied by Britz, Mainetti, and Pezzoli. In this paper we give an equivalent, easier to grasp,definition of the same binary operation, and we prove it to be just an example of a bigger familyof binary operations, which are shown to have interesting interpretation and meaning.AMS Subject Classification: 05A18, 05C90, 03E02, 91D30. |
